CN114675475A - Optical machine plate and projection optical machine - Google Patents
Optical machine plate and projection optical machine Download PDFInfo
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- CN114675475A CN114675475A CN202210178551.1A CN202210178551A CN114675475A CN 114675475 A CN114675475 A CN 114675475A CN 202210178551 A CN202210178551 A CN 202210178551A CN 114675475 A CN114675475 A CN 114675475A
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- metal plate
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- sheet
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Images
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Abstract
The application discloses ray apparatus board and projection ray apparatus. The ray apparatus board is applied to the projection ray apparatus, the ray apparatus board includes: a metal plate having a first surface and a second surface disposed opposite to each other; the baffle part is arranged on the first surface and is arranged on a light path of the projection light machine in a dark state; a heat conductive sheet provided on the first surface and/or the second surface, and extending to and covering a surface of the baffle portion.
Description
Technical Field
The present application relates to the field of optical device technology, and more particularly, to an optical engine board and a projection optical engine.
Background
With the rapid development of projection technology, the projection screen is widely applied to the fields of mobile smart televisions, screen-less televisions, game display screens, digital signs, wearable displays, ultra-portable display screens and the like. When used with optical systems, Digital Light Processing (DLP) projection technology can display very sharp, high quality images or video.
At present, the structure of the projection optical machine is more compact, and the optical machine main body and the lenses are limited by cost to use more plastic materials, so that the temperature inside the optical machine main body and the temperature of the lenses are more concentrated and are difficult to transfer, especially when a dark picture is projected, most of the illumination energy is absorbed by the light barrier near the internal prism, the temperature of the plastic optical machine main body near the prism is further improved, meanwhile, the plastic lenses near the light barrier can be influenced by the heat radiation of the light barrier to cause the temperature rise, and if the optical machine is operated for a long time under the state, the risk of lens failure can be increased.
Disclosure of Invention
An object of this application is to provide a ray apparatus board and new technical scheme of projection ray apparatus.
According to a first aspect of embodiments herein, a bare engine board is provided. The ray apparatus board is applied to the projection ray apparatus, the ray apparatus board includes:
a metal plate having a first surface and a second surface disposed opposite to each other;
the baffle part is arranged on the first surface and is arranged on a light path of the projection light machine in a dark state;
a heat-conductive sheet provided on the first surface and/or the second surface, and extending to and covering a surface of a baffle portion.
Optionally, the baffle portion has an outer surface facing away from the interior of the projector engine, and the heat conducting sheet covers the outer surface.
Optionally, the thermally conductive sheet is a composite graphite sheet.
Optionally, the composite graphite sheet comprises at least two sheets of graphite sheet arranged in a stack, with a first protective layer disposed between adjacent sheets of graphite;
wherein one side of one of the graphite sheets facing away from the first protective layer is provided with a second protective layer;
the other graphite sheet is provided with a third protective layer on the side facing away from the first protective layer.
Optionally, a through hole is formed in the metal plate, and the through hole is arranged at a position close to the baffle plate part; in a case where the heat-conducting fin is provided on the second surface, the heat-conducting fin extends into the through hole and covers the surface of the baffle portion.
Optionally, the optical engine board further comprises an insulating sheet, the insulating sheet is disposed on the second surface of the metal plate and covers the through hole.
Optionally, the baffle portion is integrally formed with the metal plate.
Optionally, the baffle portion includes a first baffle plate and a second baffle plate, the first baffle plate is connected to an edge of the metal plate, the second baffle plate is located on the metal plate, and the second baffle plate is connected to an edge of the through hole, and a shape of the second baffle plate is matched with a shape of the through hole.
Optionally, the first baffle has a third surface and a fourth surface that are opposite to each other, the second baffle has a fifth surface and a sixth surface that are opposite to each other, the fourth surface and the sixth surface are away from the inside of the projector, and the fourth surface and the sixth surface are provided with the heat conducting fins.
According to a second aspect of the embodiments of the present application, a projection light engine is provided. The projection light engine comprises the light engine board according to the first aspect.
Optionally, a DMD module is disposed on the projection light machine, and the baffle portion is located on a light path of the DMD module in the dark state.
Optionally, a prism assembly and a plastic lens are arranged in the projection light machine; the plastic lens is arranged at the position close to the prism component;
the baffle part comprises a first baffle and a second baffle, the first baffle is positioned on one side of the prism assembly, the second baffle is positioned on the other side of the prism assembly, and the second baffle is positioned between the prism assembly and the plastic lens.
Optionally, the surface of the first baffle, which faces away from the prism assembly, is provided with the heat-conducting fin, and/or the surface of the second baffle, which faces away from the prism assembly, is provided with the heat-conducting fin.
In this application embodiment, provide an ray apparatus board, be provided with the conducting strip on the first surface of ray apparatus board and/or second surface, the conducting strip extends to the baffle and covers the surface of baffle simultaneously, and the heat transfer that this application conducting strip can effectual and directly will concentrate on the baffle is outside to the projection ray apparatus, has reduced the inside bulk temperature of ray apparatus.
Other features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic view of a structure of a ray board according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of another view of the optical mechanical board according to the embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of another view angle of the optical mechanical board according to the embodiment of the present application.
Fig. 4 is a first structural diagram of an embodiment of the optical engine board of the present application.
Fig. 5 is a schematic structural diagram of an embodiment of the optical engine board of the present application.
Fig. 6 is a schematic view showing the structure of a composite graphite sheet of the present application.
Description of reference numerals:
1. a metal plate; 11. a first surface; 12. a second surface; 13. a through hole;
2. a baffle portion; 21. a first baffle plate; 22. a second baffle; 211. a third surface; 212. a fourth surface; 221. a fifth surface; 222. a sixth surface;
3. a heat conductive sheet; 31. a first graphite sheet; 32. a second graphite sheet; 33. a first protective layer; 34. a second protective layer; 35. a third protective layer; 4. a prism assembly; 5. a plastic lens.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The application provides a ray apparatus board, ray apparatus board are applied to the projection ray apparatus, and the ray apparatus board plays the heat conduction effect, can reduce the inside temperature of projection ray apparatus. The optical machine plate can be an optical machine cover plate which is covered on the bottom shell of the projection optical machine; or the optical engine board can be a metal plate on the optical engine bottom shell. The light engine board may thus be a top or bottom board in a projector light engine configuration.
Referring to fig. 1-5, the light engine board includes: a metal plate 1, a baffle plate portion 2, and a heat conductive sheet 3. The optical engine boards shown in fig. 1-3 differ from the optical engine boards shown in fig. 4-5 in that: wherein the baffle portion 2 shown in fig. 1-3 comprises two baffles, including a first baffle 21 and a second baffle 22. The baffle portion 2 shown in fig. 4 and 5 includes a baffle. In this embodiment, the number of the baffles is not limited, and the baffle portion 2 may be disposed on the light path when the projection light engine is in the dark state.
Referring to fig. 1-5, the metal plate 1 has a first surface 11 and a second surface 12 which are opposite to each other, and in use, the first surface 11 of the metal plate 1 is disposed toward the interior of the projector engine, and the second surface 12 of the metal plate 1 is disposed away from the interior of the projector engine. The baffle portion 2 is arranged on the first surface 11 of the metal plate 1, the heat conducting sheet 3 is arranged on the first surface 11 and/or the second surface 12 of the metal plate 1, meanwhile, the heat conducting sheet 3 extends to the baffle portion 2 and covers the surface of the baffle portion 2, so that the first surface 11 and/or the second surface 12 of the metal plate 1 and the surface of the baffle portion 2 are provided with the heat conducting sheet 3, the heat conducting sheet 3 can be effective, and the temperature concentrated on the baffle portion 2 and the temperature of the lens around the baffle portion 2 can be directly transmitted to the outside of the projection light machine.
In one embodiment, the heat conductive sheet 3 is provided on the first surface 11 of the metal plate 1. Since the baffle portion 2 is provided on the first surface 11, and the heat conductive sheet 3 is provided on the first surface 11, the heat conductive sheet 3 may directly extend to the baffle portion 2 and cover the surface of the baffle portion 2. In still another embodiment, the thermally conductive sheet 3 is provided on the second surface 12 of the metal plate 1 while the thermally conductive sheet 3 covers the surface of the baffle portion 2. In another embodiment, the heat conductive sheet 3 is provided on both the first surface 11 and the second surface 12 of the metal plate 1, while the heat conductive sheet 3 extends to the baffle portion 2 and covers the surface of the baffle portion 2.
In use, since the first surface 11 of the metal plate 1 is disposed toward the interior of the projector, and the second surface 12 of the metal plate 1 is disposed away from the interior of the projector, the temperature of the first surface 11 of the metal plate 1 will be higher than the temperature of the second surface 12 of the metal plate 1, for example, the first surface 11 of the metal plate 1 will be exposed to direct light rays from the interior of the projector, and the temperature of the first surface 11 is higher than the temperature of the second surface 12. In order to prevent the thermally conductive sheet 3 provided on the first surface 11 from being directly irradiated with light and to prevent the thermally conductive sheet 3 from being melted with the adhesive of the first surface 11 in a high temperature environment, in particular, the thermally conductive sheet 3 is provided on the second surface 12 of the metal plate 1 while the thermally conductive sheet 3 covers the surface of the baffle portion 2.
The first surface 11 of the metal plate 1 is provided with a baffle part 2, and the baffle part 2 is arranged on the light path of the projection light machine in the dark state. Specifically, when the projector projects a dark color image, most of the light will be projected onto the baffle portion 2, and the temperature on the baffle portion 2 will be increased; when the temperature of the baffle portion 2 increases, the temperature of the baffle portion 2 is radiated to the lens nearby, resulting in an increase in the temperature of the lens. Therefore, when the projector engine is in a dark state, the temperature of the baffle portion 2 and the lenses around the baffle portion 2 is increased inside the projector engine, and most of the heat is concentrated on the baffle portion 2 and the lenses around the baffle portion.
In the prior art, the temperature of the baffle portion 2 and the surrounding lenses is conducted by the metal plate, but the metal plate has limited heat conduction capability, and the temperature of the baffle portion and the surrounding lenses cannot be reduced well. Particularly, when the peripheral lenses have plastic lenses, the temperature of the plastic lenses cannot be quickly reduced, and the plastic lenses can be in a film cracking, deformation or even melting state, so that the imaging analysis and the service life of the projection optical machine are influenced to a great extent.
For this purpose, the present application provides the heat conductive sheet 3 on the first surface and/or the second surface 12 of the metal plate 1 and the surface of the baffle portion 2. Because when projecting dark field or black region (when the projection ray apparatus is in the dark state promptly), most light is absorbed by baffle portion 2 and causes local energy to concentrate and lead to the high temperature, this application can be more directly effectual near metal sheet and projection ray apparatus outside heat conduction after the attached conducting strip 3 of baffle portion 2, slows down the problem that illumination energy concentrates. In addition, the baffle part 2 is not in contact with the lenses nearby, so the heat transfer between the baffle part 2 and the lenses mainly takes radiation heat exchange as the main part, and after the heat conducting fins are attached to the baffle part 2, the heat conducting fins 3 can play a role in heat insulation due to the lower longitudinal heat transfer coefficient of the heat conducting fins 3, and the radiation heat exchange is reduced. Meanwhile, the heat conducting fins 3 effectively transfer the heat concentrated on the baffle part and reduce the surface temperature of the baffle part, so that the effect of reducing radiation heat exchange is also achieved.
In this embodiment, the heat conducting fins 3 are disposed on the first surface and/or the second surface 12 of the metal plate 1 and the surface of the baffle portion 2, so that the baffle portion 2 and the lenses around the baffle portion are quickly heat-dissipated without changing the internal structure of the projection optical machine, and the method for dissipating heat of the baffle portion 2 and the lenses around the baffle portion is simple.
In one embodiment, referring to fig. 1 and 2, the baffle portion 2 faces away from the outer surface of the projector engine interior, and the heat-conducting sheet 3 covers the outer surface.
In a specific embodiment, the baffle portion 2 has an inner surface and an outer surface which are opposite to each other, and in use, the inner surface of the baffle portion 2 is a surface close to the prism assembly 4, that is, the inner surface of the baffle portion 2 is disposed toward the inside of the projector; the surface of baffle portion 2 is for keeping away from the surface of prism subassembly 4, and the surface of baffle portion 2 deviates from the inside setting of projection light machine promptly. Due to the position setting relationship between the inner surface and the outer surface of the baffle portion 2, the inner surface of the baffle portion 2 is directly irradiated by light, and the outer surface of the baffle portion 2 is not directly irradiated by light. In this embodiment, the heat conductive sheet 3 is provided on the outer surface of the baffle portion 2, and since the outer surface of the baffle portion 2 is not directly irradiated with light, the heat conductive sheet 3 is not irradiated with light directly, and the volatile matter generation amount of the adhesive connecting the heat conductive sheet 3 and the baffle portion 2 is small, and the cleanliness of the inside of the projection light machine is not affected. If set up conducting strip 3 on the internal surface of baffle portion 2, conducting strip 3 can directly receive the light and penetrate directly, and the overall structure of conducting strip 3 can receive the influence to and the adhesive that conducting strip 3 and baffle portion 2 are connected can be melted, influences the reliability of being connected of conducting strip 3 and baffle portion 2 on the one hand, and on the other hand has also avoided the conducting strip to produce too much volatile substance because the light penetrates directly.
For example, the heat conducting sheet 3 is attached to the outer surfaces of the second surface 12 of the metal plate 1 and the baffle plate part 2 through the back adhesive, and the heat conducting sheet 3 is not directly contacted with the irradiation of light, so that the influence of the back adhesive of the heat conducting sheet 3 generating volatile matters due to the influence of high temperature and light irradiation for a long time on the light transmittance of the lens is avoided.
In one embodiment, the thermally conductive sheet 3 is a composite graphite sheet. The composite graphite flake has a very large plane heat conductivity coefficient, so that the composite graphite flake has a very good plane temperature equalizing effect, and meanwhile, the composite graphite flake has a relatively small longitudinal heat conductivity coefficient, so that the composite graphite flake has a heat insulation effect. When the first surface 11 and/or the second surface 12 of the attached metal sheet 1 of composite graphite piece and attached on the surface of baffle portion 2, composite graphite piece can play the heat conduction and thermal-insulated effect, has reduced the heat radiation to the lens around through the baffle portion.
In this embodiment, the composite graphite sheet is provided on the first surface and/or the second surface 12 of the metal plate 1 and the surface of the baffle plate portion 2, avoiding a case where the single-graphite sheet is easily broken due to a large brittleness. For example, the composite graphite sheet can be processed into a structure matched with the metal plate 1 and the baffle plate part 2 in a stamping and shearing mode, and the back surface of the composite graphite sheet is coated with gum, so that the adhesive tape is convenient to attach and has the capacity of mass production.
In a particular embodiment, as shown with reference to fig. 6, the composite graphite sheet comprises at least two sheets of graphite disposed in a stack with a first protective layer 33 disposed between adjacent sheets of graphite;
one of the graphite sheets, on the side facing away from the first protective layer, is provided with a second protective layer 34;
the other side of the graphite sheet facing away from the first protective layer is provided with a third protective layer 35.
Specifically, referring to fig. 6, the heat conducting sheet 3 is a composite graphite sheet, the composite graphite sheet is composed of two graphite sheets and three protective layers, the composite graphite sheet is attached to the second surface 12 of the metal plate 1, and the composite graphite sheet is bent downward through the through hole 13 of the metal plate 1 and attached to the outer surface of the baffle plate portion 2 to complete the assembly. Wherein compound graphite flake through multilayer protective layer with a plurality of individual layer graphite flake cladding in the middle of, prevent that individual layer graphite flake from producing piece and getting into influence light propagation in the projection machine.
Specifically, the composite graphite sheet heat conducting sheet 3 includes two graphite sheets stacked together, the two graphite sheets include a first graphite sheet 31 and a second graphite sheet 32, a first protective layer 33 is disposed between the first graphite sheet 31 and the second graphite sheet 32, and the first graphite sheet 31 and the second graphite sheet 32 are bonded through the first protective layer 33. For example, the first protective layer 33 is a double-sided adhesive structure.
In this embodiment, a second protective layer 34 is provided on the side of the first graphite sheet 31 remote from the first protective layer 33, the side of the second protective layer 34 being adhered to the first graphite sheet 31, the second protective layer 34 being a black single-sided adhesive. Second protective layer 34 sets up to black single face and glues, can play the effect of being in the light on the one hand, and on the other hand passes through black single face and glues protection first graphite flake 31, avoids first graphite flake 31 surface condition such as piece to appear.
In this embodiment, a third protective layer 35 is provided on the side of the second graphite sheet 32 remote from the first protective layer 33, the side of the third protective layer 35 being adhered to the second graphite sheet 32, and the third protective layer 35 may be a black double-sided tape. The third protective layer 35 is provided with a black double-sided adhesive tape, so that the light blocking effect can be achieved, the first graphite sheet 31 is protected by the black double-sided adhesive tape, the situation that chips and the like appear on the surface of the first graphite sheet 31 is avoided, and the third protective layer 35 achieves the effect of being connected with the metal plate 1 and the baffle plate portion 2.
In this embodiment, the composite graphite sheet can be directly attached to the metal plate 1 and the baffle plate portion 2, so that the close contact with the metal plate 1 and the baffle plate portion 2 is ensured, the thermal contact resistance is reduced, and the operation of an operator is facilitated. The protective layer may be, for example, black double sided tape.
In one embodiment, referring to fig. 2 and 3, a through hole 13 is formed in the metal plate 1, and the through hole 13 is provided at a position adjacent to the baffle portion 2;
in the case where the thermally conductive sheet 3 is provided on the second surface 12, the thermally conductive sheet 3 extends into the through hole 13 and covers the surface of the baffle portion 2.
In this embodiment, the metal plate 1 is provided with a through hole 13. The thermally conductive sheet 3 extends into the through-hole 13, and the thermally conductive sheet 3 extending into the through-hole 13 can cover the surface of the baffle portion 2. Specifically, a through hole 13 is formed in the metal plate 1 at a position adjacent to the baffle plate part 2; the through hole 13 can expose a portion of the baffle portion 2 provided on the first surface 11 of the metal plate 1. This embodiment sets up through-hole 13 on metal sheet 1, is convenient for extend to baffle 2 with conducting strip 3 to be convenient for stretch into in through-hole 13 and then cover baffle 2 with conducting strip 3.
In one embodiment, the optical engine board further comprises an insulation sheet disposed on the second surface 12 of the metal plate 1 and covering the through hole 13.
In this embodiment, in order to prevent light inside the projector engine from propagating to the outside and prevent external stray light from entering the projector engine, an insulating sheet is covered on the through hole 13. For example, the insulating sheet may be mylar sheet.
In one embodiment, as shown with reference to fig. 1-3, the baffle portion 2 is integrally formed with the metal plate 1.
In this embodiment, the baffle portion 2 and the metal plate 1 are integrally formed. The metal plate 1 is formed by, for example, stamping or injection molding, and after the metal plate 1 is formed, the baffle plate portion 2 is formed on the metal plate 1.
In one embodiment, referring to fig. 3, the baffle portion 2 includes a first baffle 21 and a second baffle 22, the first baffle 21 is connected with the edge of the metal plate 1, the second baffle 22 is located on the metal plate 1, and the second baffle 22 is connected with the edge of the through hole 13, and the shape of the second baffle 22 is matched with the shape of the through hole 13.
Referring to fig. 1 and 3, the baffle portion 2 includes a first baffle 21 and a second baffle 22, and the first baffle 21 and the second baffle 22 combine to form the baffle portion 2. The first baffle 21 and the second baffle 22 are both located on the light path of the projection light machine in the dark state. The first shutter 21 is integrally formed on the edge of the metal plate 1. For example, the first baffle 21 is formed on the edge of the metal plate 1, and when in use, the joint between the first baffle 21 and the edge of the metal plate 1 is bent, that is, the first baffle 21 is bent toward the first surface 11, that is, the plane of the first baffle 21 is disposed at an angle with respect to the first surface 11 of the metal plate 1. The second shutter 22 is located on the metal plate 1 and connected to the through hole 13. For example, the second shutter 22 is formed on the metal plate 1, and the second shutter 22 can be completely covered on the through-hole 13 when not in use. When the metal plate is used, the joint of the second baffle 22 and the through hole 13 is bent, the through hole 13 is exposed, the second baffle 22 is bent towards the first surface 11 of the metal plate 1, and an included angle is formed between the plane of the second baffle 22 and the first surface 11 of the metal plate 1.
In this embodiment, the manner of molding the baffle portion 2 on the metal plate 1 is simple, and is convenient for the user to operate and use.
In one embodiment, referring to fig. 3, the first baffle 21 has third and fourth oppositely disposed surfaces 211 and 212, the second baffle 22 has fifth and sixth oppositely disposed surfaces 221 and 222, and the fourth and sixth surfaces 212 and 222 are disposed away from the projector interior; the heat conducting sheet 3 is disposed on the fourth surface 212 and the sixth surface 222.
In this embodiment, the fourth surface 212 and the sixth surface 222 are disposed away from the interior of the projection light machine, and the first baffle 21 and the second baffle 22 enclose a space for accommodating the prism assembly 4, that is, in use, the prism assembly 4 is located between the first baffle 21 and the second baffle 22, and at this time, the light beam of the projection light machine in the dark state is blocked by the baffle portion 2 before entering the lens module, so that most of the light is absorbed by the baffle portion, resulting in local energy concentration, and thus causing the temperature of the baffle portion and the temperature of the lens around the baffle portion to be too high.
In order to reduce the temperature of the baffle portion 2 and the temperature of the lens around the baffle portion 2, in the present embodiment, the heat conductive sheet 3 is provided on the second surface 12 of the metal plate 1, the heat conductive sheet is provided on the fourth surface 212 of the first baffle 21, and the heat conductive sheet is provided on the sixth surface 222 of the second baffle 22, and the temperature of the baffle portion 2 and the temperature of the lens around the baffle portion 2 are reduced by the heat conductive sheet 3.
According to a second aspect of the embodiments of the present application, a projection light engine is provided. The projector optical engine comprises the optical engine plate of the first aspect.
In this embodiment, use the ray apparatus board that this application embodiment provided on the projection ray apparatus, the ray apparatus board can carry out the heat dissipation to the temperature of 2 temperatures of baffle portion and 2 surrounding lenses of baffle portion and handle, has reduced the inside temperature of projection ray apparatus, has promoted the life of projection ray apparatus.
In a specific embodiment, the internal temperature of the projector light engine in the prior art and the internal temperature of the projector light engine in the present application are compared. Wherein the structure of projection ray apparatus among the prior art and this application projection ray apparatus is different except that the ray apparatus board, other structures are all the same completely.
Comparative example 1: the method comprises the steps of selecting a certain type of projection light machine, not improving a light machine plate of the projection light machine of the certain type, placing the projection light machine on a testing tool for temperature testing, and testing the temperature of the projection light machine.
Example 1: the optical machine plate of the optical machine is improved by selecting the same type of the projection optical machine as that of the comparative example 1, namely, the second surface 12 of the metal plate 1 and the outer surface of the baffle part 2 are provided with heat conducting sheets, the temperature measuring point is arranged at the center position of the upper part of the plastic lens 5 near the baffle part 2, and the temperature of the plastic lens is tested after the temperature is stable under the condition that the optical machine projects a dark field.
The test temperature of the projection light machine in embodiment 1 is reduced by about 7 degrees celsius compared with the test temperature of the projection light machine of the comparison document 1, and therefore the temperature of the inner lens of the projection light machine during working can be significantly reduced by the projection light machine provided by the application.
In one embodiment, the projection light machine is provided with a DMD module, and the baffle portion 2 is located on an optical path of the DMD module in a dark state.
In particular, the DMD module includes a DMD device having an "ON" state (i.e., an ON state) and an "OFF" state (i.e., an OFF state or referred to as a dark state), the longer the "ON" state (or the shorter the "OFF" state) the higher the luminance. Specifically, when the DMD device works, a light beam enters the surface of the DMD device at a certain angle, and when the DMD device is in an "ON" state, the light reflected by the DMD device enters a lens module of a projection light machine and is finally projected onto a screen or a wall; when the DMD device is in the "OFF" state, the light reflected by the DMD device needs to be prevented from entering the lens module as much as possible.
In this embodiment, baffle portion 2 can block the light beam of DMD module when dark state, goes out the heat conduction through metal sheet 1 and conducting strip 3 simultaneously, promotes the radiating efficiency of baffle portion 2 and its surrounding lens, and then improves the projection effect of projection ray apparatus.
In one embodiment, a prism assembly 4 and a plastic lens 5 are arranged in the projection light machine; the plastic lens 5 is arranged at the position close to the prism component 4;
the baffle portion 2 comprises a first baffle 21 and a second baffle 22, the first baffle 21 is located on one side of the prism assembly 4, the second baffle 22 is located on the other side of the prism assembly 4, and the second baffle 22 is located between the prism assembly 4 and the plastic lens 5.
In this embodiment, the plastic lenses 5 are relatively close to the baffle portion 2 and the prism assembly 4, and the plastic lenses 5 will increase the temperature of the plastic lenses 5 due to their positions. Generally, the prism assembly 4 is made of glass, and the heat-resistant temperature of the glass lens is higher than the heat-resistant stability of the plastic lens 5, so the metal plate 1 and the heat-conducting plate 3 mainly reduce the temperature of the plastic lens 5 and the baffle 2.
In this embodiment, the second blocking plate 22 is located in the lens cavity of the projection optics and between the prism assembly 4 and the plastic lens 5, and the first blocking plate 21 is located at one side of the prism assembly 4, such that the first blocking plate 21 and the second blocking plate 22 wrap around a portion of the apex of the prism assembly 4. At this moment, the light beam of the DMD module in the dark state is shielded by the baffle portion 2 before entering the lens module, and the temperature of the plastic lens 5 can be directly transmitted to the metal plate 1 through the heat conducting sheet 3, and can be transmitted to the outside of the projection optical machine quickly, thereby preventing the damage to the plastic lens 5.
In one embodiment, the surface of the first baffle 21 facing away from the prism assembly 4 is provided with the thermally conductive sheet, and/or the surface of the second baffle 22 facing away from the prism assembly 4 is provided with the thermally conductive sheet.
In this embodiment, in order to reduce the temperature of the baffle portion 2 and the temperature of the lenses around the baffle portion 2, the heat conducting sheet is disposed on the second surface 12 of the metal plate 1, and at the same time, the heat conducting sheet is disposed on the surface of the first baffle 21 away from the prism assembly 4 and the heat conducting sheet is disposed on the surface of the second baffle 22 away from the prism assembly 4, so that the temperature of the baffle portion 2 and the temperature of the lenses around the baffle portion 2 are reduced through the heat conducting sheets.
In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.
Although some specific embodiments of the present application have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (13)
1. The optical-mechanical board is applied to a projection optical machine, and comprises:
a metal plate (1), the metal plate (1) having a first surface (11) and a second surface (12) which are oppositely arranged;
the baffle part (2) is arranged on the first surface (11), and the baffle part (2) is arranged on a light path of the projection light machine in a dark state;
a heat-conducting sheet (3) provided with the heat-conducting sheet (3) on the first surface and/or the second surface (12), and the heat-conducting sheet (3) extending to the baffle portion (2) and covering the surface of the baffle portion (2).
2. The light engine board according to claim 1, characterized in that the baffle portion (2) has an outer surface facing away from the interior of the projection light engine, the heat conducting fins (3) covering the outer surface.
3. The bare board according to claim 1, characterised in that the heat conducting fins (3) are composite graphite sheets.
4. The optical engine board of claim 3, wherein the composite graphite sheets comprise at least two graphite sheets arranged in a stack, with a first protective layer (33) disposed between adjacent graphite sheets;
wherein a side of one of the graphite sheets facing away from the first protective layer is provided with a second protective layer (34);
the other graphite sheet is provided with a third protective layer (35) on the side facing away from the first protective layer.
5. The optical bench board according to claim 1, characterized in that the metal plate (1) is formed with a through hole (13) at a position adjacent to the baffle portion (2);
in the case where the heat conductive sheet (3) is provided on the second surface (12), the heat conductive sheet (3) extends into the through hole (13) and covers the surface of the baffle portion (2).
6. Optical board according to claim 5, characterized in that it further comprises an insulating sheet provided on the second surface of the metal plate (1) and covering the through hole (13).
7. The optical bench board according to claim 1, characterized in that the baffle portion (2) is integrally formed with the metal plate (1).
8. The optical engine board according to claim 5, characterized in that the baffle portion (2) comprises a first baffle (21) and a second baffle (22), the first baffle (21) being connected to an edge of the metal plate (1), the second baffle (22) being located on the metal plate (1), and the second baffle (22) being connected to an edge of the through hole (13), the second baffle (22) having a shape that conforms to the shape of the through hole (13).
9. The light engine board of claim 8, wherein the first baffle (21) has third and fourth oppositely disposed surfaces (211, 212), the second baffle (22) has fifth and sixth oppositely disposed surfaces (221, 222), the fourth and sixth surfaces (212, 222) being disposed away from the projection engine interior;
the heat-conducting sheet (3) is provided on the fourth surface (212) and the sixth surface (222).
10. A projection light engine comprising the light engine board of any one of claims 1-9.
11. The light-machine according to claim 10, wherein a DMD module is disposed on the light-machine, and the baffle (2) is located on the light path of the DMD module in the dark state.
12. The optical projection engine according to claim 10, wherein a prism assembly (4) and a plastic lens (5) are disposed in the optical projection engine; the plastic lens (5) is arranged at the position close to the prism component (4);
the baffle portion (2) comprises a first baffle (21) and a second baffle (22), the first baffle (21) is located on one side of the prism assembly (4), the second baffle (22) is located on the other side of the prism assembly (4), and the second baffle (22) is located between the prism assembly (4) and the plastic lenses (5).
13. The projection light engine according to claim 12, characterized in that the surface of the first baffle (21) facing away from the prism assembly (4) is provided with the thermally conductive sheet (3) and/or the surface of the second baffle (22) facing away from the prism assembly (4) is provided with the thermally conductive sheet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178551.1A CN114675475B (en) | 2022-02-25 | Optical board and projection optical machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178551.1A CN114675475B (en) | 2022-02-25 | Optical board and projection optical machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114675475A true CN114675475A (en) | 2022-06-28 |
| CN114675475B CN114675475B (en) | 2024-05-14 |
Family
ID=
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